PHILADELPHIA (KYW Newsradio) -- Philadelphia police are asking for the public's help identifying a suspect caught on surveillance video spray painting racist messages outside a SEPTA station. And authorities believe the same man is behind several similar incidents in the city.

A security camera outside the SEPTA station at Broad Street and Snyder Avenue captured the suspect in the act on November 20.

In the video, the suspect is seen pulling up alongside a building on a bike. After taking a look around, he pulls out a can of spray paint and writes "white world" and "white pride," as well as some symbols on the wall and leaves.

Those same messages were found on Moore Street on November 11, and on Snyder Avenue on the November 19.

Similar messages and Neo-Nazi symbols were found on four other buildings in on November 20 as well.